ExploreFish

Cookiecutter Shark

Isistius brasiliensis

The Cookiecutter Shark is a small but fascinating fish known for its unique feeding behavior. It takes cookie-shaped bites out of larger animals like whales and dolphins!

Habitat: Deep Sea

Appearance

The Cookiecutter Shark is a small, torpedo-shaped shark with a brown-grey body and a distinct dark band around its gills, resembling a collar. It has large green eyes and a glowing belly that helps it blend into its deep-sea environment.

KingdomAnimaliaPhylumChordataClassElasmobranchiiOrderSqualiformesFamilyDalatiidaeGenusIsistius

Cookiecutter Shark

Interesting facts

After biting on, this shark spins its body to perfectly carve out a circular piece of flesh.

Amazingly, it loses and regrows its entire set of lower teeth all at once!

It bites chunks out of large animals like whales, dolphins, and even submarines!

Its lower teeth are all joined at their base, creating a single, saw-like cutting blade.

Special abilities

Cookiecutter Shark has a glowing belly that helps it disappear in dim light, making it a tricky hunter from below.

Cookiecutter Shark can take perfect circular bites thanks to its razor-sharp, connected lower teeth and suction-cup lips.

Cookiecutter Shark travels thousands of meters up and down daily, following prey from deep ocean to shallower waters.

Measurements & details

Length: 42-56 cm
Weight: 0.2-0.6 kg
Lifespan: 20-30 years
Swim Speed: 2 km/h
Max Depth: 3700 m
Water Type: Saltwater

Diet & Feeding

This tiny shark takes cookie-cutter bites out of much bigger ocean creatures!

Primary Foods

Tuna
Dolphins
Whales
Mackerel
Squid
Other sharks

Foraging Method

Ambush

Ecological connections

eats

Yellowfin Tuna

Thunnus albacares

leaves distinctive circular bite marks on tuna.

eats

Bottlenose Dolphin

Tursiops truncatus

often targeted for bites while swimming in the open ocean.

eats

Pygmy Sperm Whale

Kogia breviceps

inflicts circular wounds on this smaller deep-diving whale.

eats

Megamouth Shark

Megachasma pelagios

even other large sharks are not safe from its bites.

Traits

Camouflaged

Look closely for animals that are masters of disguise, blending perfectly into their surroundings! Their colors and patterns help them hide from others.

Tool Use

Discover amazing animals that cleverly use objects from their environment to help them find food, build homes, or protect themselves. They're nature's clever inventors!

Ambush Predator

Meet masters of surprise! These clever hunters hide quietly and wait patiently for their prey to come close before pouncing with a quick move.

Ancient Lineage

These fascinating organisms carry echoes of the deep past, with ancestors that have roamed the Earth for an incredible span of time. They are living links to ancient worlds!

Deep Sea

Plunge into the mysterious, dark depths of the ocean, where bizarre and wonderful creatures live under immense pressure! It's a world unlike any other.